| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Socorro | 1 | 8,171 | 8,674 | -1.09% | 565 | 14 | City |
| Rio Communities | 2 | 4,954 | 4,933 | 0.02% | 644 | 8 | City |
| Magdalena | 3 | 769 | 807 | -0.9% | 124 | 6 | Village |
Socorro is the largest city in Socorro County, with a population of 8,171.
Magdalena is the smallest city in Socorro County, with a population of 769.
There are 3 cities in Socorro County, New Mexico.